eagles_dare13

For me it is completely random and unpredictable.

Some days I will wake up early, plan on going to the library for five hours, and I would get there and have so little concentration that I would end up having to get up and leave. I would stare at a page and not retain anything.

Other times I will just randomly find myself in a state of extreme concentration and get five hours worth of studying done in two, and I would "write" the concepts to my brain permanently.

It made me mad in that I had no way to control it or predict it. I found that earplugs and not drinking at all for the month before the test hugely helped my concentration though.